Publication: Gated-controlled electron pumping in connected quantum rings
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2014-07-04
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Lima, R.P.A.
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Elsevier
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Abstract
We study the electronic transport across connected quantum rings attached to leads and subjected to time-harmonic side-gate voltages. Using the Floquet formalism, we calculate the net pumped current generated and controlled by the side-gate voltage. The control of the current is achieved by varying the phase shift between the two side-gate voltages as well as the Fermi energy. In particular, the maximum current is reached when the side-gate voltages are in quadrature. This new design based on connected quantum rings controlled without magnetic fields can be easily integrated in standard electronic devices.
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© Physics Letters A.
CAPES via project PPCP-Mercosul (Brazilian Research Agency) [25/2011]; CNPq (Brazilian Research Agency) [472204/2010-6]; FAPEAL (Alagoas State Research Agency) [2011.0908.011.0025.0087]; MINECO [MAT2010-17180, MAT2013-46308].
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